Michael Buble Talks New Album, Baby Names and Reese Witherspoon

Grammy award-winning singer Michael Buble spoke to "Nightline" about how his life has changed since getting married and preparing for a baby, making music and why he asked Reese Witherspoon to sing a duet with him on his new album.

"I think there was a fire in me that, in my life, is unmatched," said Buble in an interview with "Nightline's" Cynthia McFadden. "I don't think that I've ever met anyone who was as hungry as I was."

Buble is the Frank Sinatra of his generation, with the smooth voice and liquid phrasing to prove it. His new album, "To Be Loved," which was released Tuesday, is no exception.

"I make records for people, so of course I hope that there is something for everyone," he said. "But at the same time I know exactly what I am aiming for."

Having sold 45 million albums, earning three Grammys and headlining world tours, the 37-year-old Canadian native with a blue-collar upbringing seems to have it all. But as life on the road was starting to feel "natural," Buble said that was changing.

The singer is married to Luisana Lopilato, a 25-year-old Argentinean actress famous abroad, and they are eagerly expecting their first child, a baby boy, this summer -- so he has already cut back on some tour dates.

Buble and his wife plan to have the baby in Canada and to get him Canadian, Argentinean and Italian citizenship -- both Buble and Lopilato also have Italian citizenship. But when it comes to baby names, the two say they can't agree on whether to pick a Spanish or English name.

"One of my favorite singers growing up was named Vaughn Monroe," Buble said. "I love Vaughn and I love Vaughn Buble, but it is out."

Lopilato said she liked the name Marlin, but Buble nixed that one.

"All I can think when you hear Marlin is fish," he said. "What I'm doing now is I'm pretty much screwing with her and I'm trying to come up with names that she thinks I'm serious about. For awhile, I've been telling her I want to name the kid Thor."

Before meeting Lopilato, Buble had gone through a very public break-up with actress Emily Blunt, something Buble was candid about. The two had started dating in 2005 and split in 2008, which Buble said was "devastating."

"It's not just about love. It's not just about heartbreak. It's about ego. Your ego is destroyed," he said. "Every grocery store I walk in, I'm on the cover of magazines, and I was getting the blame for it. No one knew the real story. No one will ever know the real story. That's not their business to know."

Ending his relationship with Blunt caused him so much anxiety, Buble said, that he sometimes had a hard time breathing. He said he read books, talked with his grandfather, one of his idols, and went to therapy to work through it.

"I started to just practice, really, to practice living in the moment, to practice fighting that insecurity ... the same insecurity that made me who I am and where I am," Buble said.